JP3385500B2 - Interlock mechanism used for mechanical transmission - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an interlock mechanism used in a mechanical transmission.

[0002]

BACKGROUND ART Normally, in a mechanical transmission, an interlock mechanism is provided in a transmission mechanism to avoid simultaneous meshing of two sets of gears. Further, the interlock mechanism generally uses a plurality of detent plungers and interlock pins, and since it is arranged between a plurality of shifter rods in the hanger protruding into the gear case, the assembling work is difficult. It was very troublesome and the assembly time was long. That is, the interlock mechanism is first of all the pin guide, the guide of the first shifter rod.
Insert the interlock pin into the bore and thread the first shifter rod through the hole in the hanger, then insert the detent plunger into the hanger's plunger guide bore adjacent to the shifter rod. , Next, the pin guide of the second shifter rod
Insert the other interlock pin into the bore, part 2
Insert the second shifter rod through the other hole of the hanger,
And another detent on the other plunger guide bore on the hanger adjacent to the shifter rod.
Since the plunger is inserted and the work is repeated and assembled, the assembling work becomes very troublesome and the assembling time becomes long.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to provide an interlock mechanism used in a mechanical transmission which can be easily assembled to shorten the assembly time.

[0004]

[Means corresponding to the problem and its action]
At least three shifter rod grooves which are opened at a predetermined distance on the lower surface and allow at least three shifter rods to be fitted to each other, and between the at least three shifter rod grooves, a direction orthogonal to the grooves. An interlock housing assembled to a gear case with at least two plunger guide bores communicating with and drilled into the at least two plunger guide bores;
At least two detents that fit into the bore
The plunger and its at least three shifter rods are drilled orthogonally to the rest of the shifter rods except the shifter rods on either side thereof, and the plunger guide in the neutral position of the remaining shifter rods. A pin guide bore fitted to the bore, and at least one interlocking pin fitted to the detent plunger and fitted to the bore, and the interlocking pin of the remaining shifter rod in advance. Its detent plungers are fitted to its pin guide bores, respectively, to its plunger guide bores of its interlock housing, then all its shifter rods are assembled to its gear case, then In the gear case, the interlock While sliding ing from above allows combining the interlock housing in the gear case by fitting the shifter rod to the shifter rod groove.

[0005]

DESCRIPTION OF SPECIFIC EXAMPLES Specific specified examples of the interlock mechanism used in the mechanical transmission of the present invention will be described below with reference to the drawings. FIGS. 1 to 3 show a specific example 10 of the interlock mechanism used in the mechanical transmission of the present invention, which is embodied to be suitable for a mechanical transmission 40 with an oil pump of 6 forward speeds and 1 reverse speed. Is shown. The interlock mechanism 10 has four shifter rods 46, 4 opened on the lower surface 13 at a predetermined interval.
Four shifter rod grooves 14,15,16,17 enabling corresponding fitting of 7,48,49 and the grooves between the four shifter rod grooves 14,15,16,17 Three plunger guide bores 1 that communicate with each other in the direction orthogonal to 14, 15, 16, 17 and are drilled
The interlock housing 11 having the 8, 19, and 20 assembled to the gear case 41 and the three detent plungers 25 correspondingly fitted to the three plunger guide bores 18, 19, and 20. , 2
6,27 and the four shifter rods 46,47,4
8 and 49, shifter rods 46 and 49 on both sides thereof
Except for the remaining shifter rods 47 and 48, which are orthogonally drilled, and the remaining shifter rods 4
Pin guides fitted to their plunger guide bores 18, 19, 20 at 7,48 neutral positions
It comprises two interlocking pins 36, 37 which are fitted in the bores 34, 35 and abut against their detent plungers 25, 26, 27.

The interlock housing 11 has a flange 21 on its upper surface 12 and a pair of side extension housings 22, 22 on its lower surface 13, and all the shifter rods 46, 4 thereof.
7, 48, 49 are assembled to the gear case 41 and later all of the shifter rods 46, 47, 48, 4
9 and then its gear case 4
Made into a comb-shaped block that can be assembled into 1.

And, this interlock housing 1
In 1, since die casting, sand casting, etc. are used,
When the interlock housing 11 is molded,
The shifter rod grooves 14, 15, 16, 17 are formed in the interlock housing 11 at predetermined intervals in the left-right direction, and after the molding, the plunger guide bores 18, 19, 20 are From the side surface of the interlock housing 11 with a drill, between the shifter rod grooves 14, 15, 16 and 17, the groove 14, 1
The holes 5 and 16 and 17 are orthogonal to each other and are drilled in a straight line.
Further, the interlock housing 11 has a pair of bolt holes 23, 23 formed in the flange 21 thereof, while bolt holes 24, 24 are formed in the pair of side extension housings 22, 22, respectively. Then, the bosses 44, 44 and 45, 45 protruding inside the gear case 41 are machined so that they can be tightened with washer head bolts 38, 38 and 39, 39.

The detent plungers 25, 26,
27 and interlock pins 36, 37 are detent plungers and interlock pins that are used in conventional pin-type interlock mechanisms.

Further, the shifter rods 46, 47, 4
8 and 49 correspond to the mating openings 28, 29, 3
0, 31, 32, 33 are the shifter rods 46, 4
The plunger in the neutral position of 7,48,49
Aligned with the guide bores 18, 19, 20 and matably formed with its corresponding detent plunger 25, 26, 27.

The meshing openings 28, 33 are notched in the outer surface of the shifter rods 46, 49 on the front end side. That is, since the pin guide bores 34, 35 are omitted in the shifter rods 46, 49, the shifter rods 46, 49 are respectively cut with the one engagement hole 28, 33. Missed. On the other hand, the meshing openings 29, 30, 31, 32 are the pin guides,
Since the bores 34 and 35 are opened left and right on the outer peripheral surfaces of the shifter rods 47 and 48 on the front end side, the pin guides and
Positioned concentrically in both openings of the bores 34, 35, the shifter rods 47, 48 are cut out correspondingly to the left and right of the outer peripheral surface on the front end side. Of course, the meshing openings 28, 29,
30, 31, 32, and 33 may be formed in the ring groove.

Next, the above-mentioned interlock mechanism 1
In order to explain the work of assembling the 0 into the mechanical transmission 40, first, referring to FIG.
The detent plunger 25,
26 and 27 in the plunger guide bores 18, 19 and 20 of the interlock housing 11, and the interlock pins 36 and 37 in the shifter rod 4.
7 and 48 pin guide bores 34 and 35, respectively. Next, all the shifter rods 4
6, 47, 48 and 49 are bearing holes 43 and 4 of the front end input shaft covering end wall 42.
It is fitted in the gear case 41 by fitting it into 3, 43, 43. The interlock housing 11 is then slid onto the input shaft covering end wall 42 from above as shown in FIG. 3 while the shifter rod grooves 14, 15, 16, 1 are being slid.
The shifter rods 46, 47, 48, 49 are fitted into the corresponding parts 7. Thereafter, the flange 21 is attached to the boss 44, 44 by the washer head bolt 38, 38.
The pair of side extension housings 22 and 22 are attached to the washer head bolts 39 and 39.
Are respectively tightened to the bosses 45, 45, and the interlock mechanism 10 is assembled to the gear case 41 while being assembled.

As such, the interlock mechanism 10
Is all the shifter rods 46, 47, 48,
Assembling is improved by allowing 49 to be assembled to its gear case 41 at the same time with all its shifter rods 46, 47, 48, 49, and then assembled to its gear case 41. That is,
In the interlock mechanism 10, assembling is performed after assembling all the shifter rods 46, 47, 48, 49, and the assembling work is very simple and the working time is shortened as compared with the normal interlock mechanism. It

As is apparent from the specific embodiments of the present invention described above with reference to the drawings, those skilled in the art to which the present invention pertains have a general knowledge of the present invention. Is the nature of the invention (na
It is easily embodied in another embodiment that is derived from the true) and the substance, and that is objectively recognized as having them internalized. Of course, the contents of the present invention correspond to the subject of the invention (be commensu).
rate with) and is essential for the establishment of the invention.

[0014]

Benefits of the Invention As can be seen from the above, the interlocking mechanism used in the mechanical transmission of the present invention is opened in the lower surface at a predetermined interval to allow the fitting of at least three shifter rods. A gear having at least three shifter rod grooves and at least two plunger guide bores bored between the at least three shifter rod grooves in a direction orthogonal to the grooves. Excluding the interlock housing assembled to the case, the at least two detent plungers that fit into the at least two plunger guide bores, and the shifter rods on both sides of the at least three shifter rods. The remaining shifter rods are orthogonally drilled, and the remaining shifter rods are drilled. At least one interface is butted to the detent plunger is fitted in the neutral position of the motor-rod pin guide bore is aligned to the plunger guide bore lock
Since it includes a pin, the interlock mechanism used in the mechanical transmission of the present invention allows the interlock housing to be combined with all of its shifter rods at the same time, and then be assembled with the gear case. Assembly is improved, i.e.
The assembly work is very easy and the work time is shortened, and the cost is reduced accordingly.
Very useful and practical for transmission.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a specific example of an interlock mechanism used in a mechanical transmission of the present invention which is applied to a mechanical transmission with an oil pump for forward 7th speed and reverse 1st speed.

FIG. 2 is a vertical cross-sectional view showing the interlock mechanism shown in FIG. 1 in the axial direction of the mechanical transmission.

FIG. 3 is a cross-sectional view illustrating an assembling operation of the interlock mechanism shown in FIG.

[Explanation of symbols]

11 Interlock housing 14 shifter rod groove 15 shifter rod groove 16 shifter rod groove 17 shifter rod groove 18 Plunger Guide Bore 19 Plunger Guide Boa 20 Plunger Guide Bore 25 Detent Plunger 26 Detent Plunger 27 Detent Plunger 34 pin guide bore 35 pin guide bore 36 interlock pin 37 Interlock Pin

Front page continuation (58) Fields investigated (Int.Cl. ⁷ , DB name) F16H 61/26-61/36 F16H 63/00-63/38

Claims (3)

(57) [Claims] 1. At least three shifter rod grooves, which are opened at a predetermined interval on a lower surface to allow at least three shifter lots to be fitted to each other, and at least three thereof.
An interlock housing assembled in a gear case with at least two plunger guide bores that are bored between the shifter rod grooves in a direction orthogonal to the shifter rod grooves; At least two detent plungers that fit into each of the plunger guide bores and are drilled orthogonally to the remaining shifter rods of the at least three shifter rods except the shifter rods on either side of the shifter rods. , And at least one interlocking pin mated with the pin guide bore and abutted with the detent plunger in the neutral position of the remaining shifter rod, which is aligned with the plunger guide bore. Then, in advance, the interlock pin is The detent plunger to its pin guide bore of the rod, and its detent plunger to its plunger guide bore of its interlock housing, respectively, and then all its shifter rods to its gear case. After that, the interlock housing is slid onto the gear case from above, and the shifter rod is fitted into the shifter rod groove, and the interlock housing is attached to the gear case.
An interlock mechanism used in mechanical transmissions that combine housings. 2. The interlock mechanism used in a mechanical transmission as claimed in claim 1, wherein the interlock housing is made in a block. 3. The interlock mechanism used in the mechanical transmission according to claim 1, wherein the interlock housing includes a flange on an upper surface and a pair of side extension housings on a lower surface.